diff options
Diffstat (limited to 'indra/llimage/llimage.h')
| -rw-r--r-- | indra/llimage/llimage.h | 57 |
1 files changed, 32 insertions, 25 deletions
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h index 10444e7f89..c464c3b2b6 100644 --- a/indra/llimage/llimage.h +++ b/indra/llimage/llimage.h @@ -2,31 +2,25 @@ * @file llimage.h * @brief Object for managing images and their textures. * - * $LicenseInfo:firstyear=2000&license=viewergpl$ - * - * Copyright (c) 2000-2009, Linden Research, Inc. - * + * $LicenseInfo:firstyear=2000&license=viewerlgpl$ * Second Life Viewer Source Code - * The source code in this file ("Source Code") is provided by Linden Lab - * to you under the terms of the GNU General Public License, version 2.0 - * ("GPL"), unless you have obtained a separate licensing agreement - * ("Other License"), formally executed by you and Linden Lab. Terms of - * the GPL can be found in doc/GPL-license.txt in this distribution, or - * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * Copyright (C) 2010, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. * - * There are special exceptions to the terms and conditions of the GPL as - * it is applied to this Source Code. View the full text of the exception - * in the file doc/FLOSS-exception.txt in this software distribution, or - * online at - * http://secondlifegrid.net/programs/open_source/licensing/flossexception + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. * - * By copying, modifying or distributing this software, you acknowledge - * that you have read and understood your obligations described above, - * and agree to abide by those obligations. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ @@ -41,8 +35,21 @@ const S32 MIN_IMAGE_MIP = 2; // 4x4, only used for expand/contract power of 2 const S32 MAX_IMAGE_MIP = 11; // 2048x2048 + +// *TODO : Use MAX_IMAGE_MIP as max discard level and modify j2c management so that the number +// of levels is read from the header's file, not inferred from its size. const S32 MAX_DISCARD_LEVEL = 5; +// JPEG2000 size constraints +// Those are declared here as they are germane to other image constraints used in the viewer +// and declared right here. Some come from the JPEG2000 spec, some conventions specific to SL. +const S32 MAX_DECOMPOSITION_LEVELS = 32; // Number of decomposition levels cannot exceed 32 according to jpeg2000 spec +const S32 MIN_DECOMPOSITION_LEVELS = 5; // the SL viewer will *crash* trying to decode images with fewer than 5 decomposition levels (unless image is small that is) +const S32 MAX_PRECINCT_SIZE = 2048; // No reason to be bigger than MAX_IMAGE_SIZE +const S32 MIN_PRECINCT_SIZE = 4; // Can't be smaller than MIN_BLOCK_SIZE +const S32 MAX_BLOCK_SIZE = 64; // Max total block size is 4096, hence 64x64 when using square blocks +const S32 MIN_BLOCK_SIZE = 4; // Min block dim is 4 according to jpeg2000 spec + const S32 MIN_IMAGE_SIZE = (1<<MIN_IMAGE_MIP); // 4, only used for expand/contract power of 2 const S32 MAX_IMAGE_SIZE = (1<<MAX_IMAGE_MIP); // 2048 const S32 MIN_IMAGE_AREA = MIN_IMAGE_SIZE * MIN_IMAGE_SIZE; @@ -170,7 +177,7 @@ public: LLImageRaw(U16 width, U16 height, S8 components); LLImageRaw(U8 *data, U16 width, U16 height, S8 components); // Construct using createFromFile (used by tools) - LLImageRaw(const std::string& filename, bool j2c_lowest_mip_only = false); + //LLImageRaw(const std::string& filename, bool j2c_lowest_mip_only = false); /*virtual*/ void deleteData(); /*virtual*/ U8* allocateData(S32 size = -1); @@ -232,7 +239,7 @@ public: protected: // Create an image from a local file (generally used in tools) - bool createFromFile(const std::string& filename, bool j2c_lowest_mip_only = false); + //bool createFromFile(const std::string& filename, bool j2c_lowest_mip_only = false); void copyLineScaled( U8* in, U8* out, S32 in_pixel_len, S32 out_pixel_len, S32 in_pixel_step, S32 out_pixel_step ); void compositeRowScaled4onto3( U8* in, U8* out, S32 in_pixel_len, S32 out_pixel_len ); @@ -272,13 +279,13 @@ public: // subclasses must return a prefered file extension (lowercase without a leading dot) virtual std::string getExtension() = 0; // calcHeaderSize() returns the maximum size of header; - // 0 indicates we don't know have a header and have to lead the entire file + // 0 indicates we don't have a header and have to read the entire file virtual S32 calcHeaderSize() { return 0; }; // calcDataSize() returns how many bytes to read to load discard_level (including header) virtual S32 calcDataSize(S32 discard_level); // calcDiscardLevelBytes() returns the smallest valid discard level based on the number of input bytes virtual S32 calcDiscardLevelBytes(S32 bytes); - // getRawDiscardLevel()by default returns mDiscardLevel, but may be overridden (LLImageJ2C) + // getRawDiscardLevel() by default returns mDiscardLevel, but may be overridden (LLImageJ2C) virtual S8 getRawDiscardLevel() { return mDiscardLevel; } BOOL load(const std::string& filename); |